Roberts replied on social media to Haskell’s apology, tweeting: “Head’s ok. Enjoyed that win with this resilient group of @Harlequins lads.

“Hope your shoulder is ok after colliding with this jaw @jameshaskell – Good man for apologizing ….just bend those arthritic knees next time pal ;).”

A Quins spokesperson said “all seemed well” with Roberts after the game, adding: “But he will have to follow HIA protocols, so [we] can’t give an exact timetable on when he’ll be back.”

Facing Scotland would mark 10 years since Roberts made his Wales debut on the wing in their 30-15 win against Scotland on 9 February, 2008 on the way to a Grand Slam in Warren Gatland’s debut season in charge.

The 31-year-old has won 94 Wales caps and three more for the British and Irish Lions.

But while the 2017 Lions were in New Zealand, Roberts led Wales to tour Test wins against Tonga and Samoa.

He was subsequently left out of Wales’ initial squad for their autumn 2017 internationals, but recalled after injuries struck and came off the bench in their 33-18 defeat by New Zealand.